components/event_dispatcher/introduction not working code

[kozloffsky]

components/event_dispatcher/introduction.rst
find "Registering Event Listeners in the Service Container"
there are peace of code

// register the event dispatcher service
$containerBuilder->register(
    'event_dispatcher',
    'Symfony\Component\EventDispatcher\EventDispatcher'
);

this does not work because needs ContainerAwareEventDispatcher.

This code works.

    $listener->addArgument($containerBuilder);
    $this->_builder->setDefinition(
        'event_dispatcher',
        $listener
    );

[wouterj]

You're suggested code is wrong, since the event dispatcher needs to be an event dispatcher, not the listener.

The code should become:

// register the event dispatcher service
$containerBuilder->register(
    'event_dispatcher',
    'Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher'
);

The text should also be tweaked saying that you need to register the ContainerAwareEventDispatcher instead of the normal EventDispatcher.

Thank you for submitting this bug @kozloffsky !

[kozloffsky]

I`ve try and this one but ContainerAwareEventDispatcher requires ContainerInterface instance in constructor so this code

// register the event dispatcher service
$containerBuilder->register(
    'event_dispatcher',
    'Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher'
);

throws exception.

[xabbuh]

@kozloffsky That's right. The container needs to be injected into the constructor. I'll create a pull request tonight.